We're having a problem with VEXnet Joystick-Controller pairing. We are able to get the Joystick and the Cortex pairing when there is a fresh firmware download on both the Cortex and the Joystick. When we download a program to the Cortex, the Joystick no longer pairs, doing one of two things: 1. The Cortex flashes only the "GAME" light on green and the Joystick flashes the "VEXnet," "ROBOT," and "JOYSTICK" lights on green 2. The Cortex flashes only the "GAME" light on green and the Joystick flashes only the "ROBOT" light on orange.]

We have tried downloading sample programs, and ones that just run motors work just fine. Ones that use the controller have no luck whatsoever. We also tried our own custom code that we've been working on, that didn't work either. We also tried a direct tether from the Joystick to the Cortex via USB A-A cable, and that didn't work either.

Please help us.

Thanks in advance.

Wed Sep 15, 2010 5:36 pm

jbflot

Site Admin

Joined: Tue May 15, 2007 9:02 amPosts: 409

Re: VEXnet pairing works for a time, until program download

VEXnet is a pretty sophisticated system. As such, there's a number of factors that can introduce technical issues. A few suggestions / things to check:

After a few hours of fiddling with it, we realized we'd set the download option in ROBOTC to USB only, instead of USB and VEXnet. Set it back and everything worked again. Thanks for all the help, though!

Wed Sep 15, 2010 10:43 pm

sphuss

Rookie

Joined: Thu Aug 25, 2011 11:57 amPosts: 1

Re: VEXnet pairing works for a time, until program download

We have a similar issue (a VEX pairing problem, that is).We are a team new to VEX and have just begun to work through the RECbot, RobotC training. After successfully downloading firmware (master, robotc, and joystick) we are able to pair joystick and cortex. However, when the VEXnet keys are inserted into joystick and cortex and turned on - all is good for a brief moment - green lights on the VEXnet LED's, but then the VEXnet connection goes red. During the brief (1 second or so) connectivity, we can control the robot with downloaded code, but after - nothing. This phenomenon has been repeated a few times with a few robots.Any suggestions?

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